GFS is like a flip flop in a chip shop at the moment. From my observations over the years, whenever a potential cold set up is on the cards, GFS spots the potential in FI, withdraws the idea, reinstates the idea, goes Pete Tong then comes back on board within the 72 hour time frame, especially if all the other models are still predicting cold within the same timeframe. And this is one of those times
GFS - Good @ Forecasting Snow (within the 72hr timeframe)
ECMWF - Exciting Cold Modelling Without Fear
UKMO - U K Modelling Outsider (just kidding)
Next week, the weather will be very cold and snowy, nationwide, guaranteed